purge a directory structure of 'old' files

scrub.sh

#!/bin/bash

[ -x "${FIND:=`which find 2>/dev/null`}" ] || { echo "ERROR: 'find' program ($FIND) not found/executable"; exit 1; }

PROG=`basename $0 .sh`
declare -i VERBOSE=0 MAXDEPTH=1 DRYRUN=0
let ${AGET:=atime}
let ${AGE:='+1'}


# Directories, files (default)
OPTIONS="dm:no:qrt:vx:"

while getopts ${OPTIONS} arg; do
  case $arg in
    # atime is not appropriate for directories
    d)  DO_DIRS=1; AGET=mtime ;;
    m)  MAXDEPTH=$OPTARG ;;
    n)  EVAL="echo" ;;
    o)  AGE="$OPTARG" ;;
    # '-q' doesn't log non-fatal errors
    q) unset VERBOSE ;;
    r)  unset MAXDEPTH ;;
    t)  AGET="$OPTARG" ;;
    v) let $((VERBOSE++)) ;;
    x) EXTRA+=" $OPTARG" ;;
    *) echo "WARN: unknown arg '-${arg}'";;
  esac
done


CMD="${FIND} . -xdev ${MAXDEPTH+-maxdepth $MAXDEPTH} ${EXTRA} -$AGET $AGE"
FILECMD="$CMD -type f -delete"
DIRCMD="$CMD -type d ! -name \. -execdir rmdir ${VERBOSE+-v} {} \;"


# clear out handled options
shift $((OPTIND-1))

while [ -n "$1" ]; do
  DIR=$1


  if [ ! -d "${DIR:?}" ]; then
    [ -n "${VERBOSE}" ] && echo "NOTICE: not a directory ($DIR)"

  else
    [ ${VERBOSE:-0} -gt 0 ] && echo "${PROG} ${DIR}"
(
# Yes, excessive paranoia
    set -e
    cd "$DIR" || exit

    [ ${DO_DIRS:-0} -eq 1 ] && ${EVAL:-eval} "$DIRCMD" || ${EVAL:-eval} "$FILECMD"
)
  fi

  shift
done